CVE-2025-20785 Overview
CVE-2025-20785 is a use-after-free vulnerability in the display driver component of MediaTek chipsets running on Android devices. This memory corruption flaw exists in the display subsystem and could allow a local attacker who has already obtained System-level privileges to escalate privileges further or corrupt memory. The vulnerability does not require user interaction for exploitation, making it particularly concerning for devices where System privileges may have been compromised through other means.
Critical Impact
Local privilege escalation through memory corruption in MediaTek display driver affecting Android 14, 15, and 16 across 45+ MediaTek chipsets used in smartphones and tablets.
Affected Products
- Google Android 14.0, 15.0, and 16.0
- MediaTek MT67xx series chipsets (MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991)
- MediaTek MT81xx/MT87xx series chipsets (MT8186, MT8188, MT8196, MT8667, MT8673, MT8676, MT8678, MT8765, MT8766, MT8768, MT8771, MT8781, MT8791T, MT8792, MT8793, MT8795T, MT8796, MT8798, MT8873, MT8883)
Discovery Timeline
- January 6, 2026 - CVE-2025-20785 published to NVD
- January 8, 2026 - Last updated in NVD database
Technical Details for CVE-2025-20785
Vulnerability Analysis
This vulnerability is classified as CWE-416 (Use After Free), a type of memory corruption flaw that occurs when a program continues to use a pointer after the memory it references has been freed. In the context of the MediaTek display driver, this condition can be triggered locally by an attacker who has already gained System privileges on the device.
The exploitation path requires local access with elevated privileges, meaning an attacker would need to first compromise the device through another vulnerability or attack vector before leveraging CVE-2025-20785. Once exploited, the use-after-free condition could enable arbitrary code execution within the kernel context or facilitate further privilege escalation beyond the System privilege level.
The vulnerability is tracked internally by MediaTek as Patch ID ALPS10149882 and Issue ID MSV-4677.
Root Cause
The root cause stems from improper memory management in the display driver subsystem. When display-related objects or resources are deallocated, references to the freed memory regions are not properly invalidated. Subsequent operations that attempt to access these dangling pointers can result in memory corruption, potentially allowing an attacker to control execution flow or overwrite critical data structures.
Attack Vector
The attack vector is local, requiring the attacker to have already established System-level access on the target Android device. The exploitation scenario involves:
- An attacker gains System privilege through a separate vulnerability or malicious application
- The attacker triggers specific display driver operations that cause memory to be freed
- The attacker manipulates memory allocation to place controlled data in the freed region
- Subsequent use of the dangling pointer allows the attacker to corrupt memory or redirect execution
The vulnerability does not require any user interaction, meaning once an attacker has the prerequisite access, exploitation can proceed silently without alerting the device owner.
Detection Methods for CVE-2025-20785
Indicators of Compromise
- Unexpected crashes or system instability in the display driver subsystem
- Anomalous system-level process behavior attempting to interact with display driver interfaces
- Memory corruption errors or kernel panics originating from display-related kernel modules
- Signs of privilege escalation attempts following initial System-level compromise
Detection Strategies
- Monitor for abnormal access patterns to MediaTek display driver interfaces from System-privileged processes
- Implement kernel memory integrity monitoring to detect use-after-free exploitation attempts
- Deploy mobile threat defense solutions capable of detecting kernel-level exploitation techniques
- Review device logs for display subsystem errors or unexpected driver behavior
Monitoring Recommendations
- Enable verbose logging for kernel display driver components where feasible
- Monitor for applications requesting or attempting to escalate beyond normal permission boundaries
- Implement runtime application self-protection (RASP) on managed enterprise devices
- Utilize SentinelOne Mobile Threat Defense for continuous monitoring of device integrity
How to Mitigate CVE-2025-20785
Immediate Actions Required
- Apply the MediaTek January 2026 security patch as soon as it becomes available from your device manufacturer
- Ensure devices are running the latest available Android security patch level
- Restrict installation of applications from untrusted sources to reduce initial compromise risk
- For enterprise environments, enforce mobile device management (MDM) policies requiring current security patches
Patch Information
MediaTek has released a security patch addressing this vulnerability as documented in the MediaTek Security Bulletin January 2026. The patch is identified by Patch ID ALPS10149882. Device manufacturers integrating MediaTek chipsets will distribute this fix through their standard Android security update channels. Users should check with their device manufacturer for availability of the update for their specific device model.
Workarounds
- No direct workarounds are available for this vulnerability as it resides in the kernel display driver
- Minimize attack surface by avoiding installation of applications from unverified sources
- Ensure device encryption is enabled to protect data in case of compromise
- Consider network-level controls to prevent lateral movement if a device is compromised
- Deploy mobile threat defense solutions like SentinelOne to detect and respond to exploitation attempts
# Check current Android security patch level on device
adb shell getprop ro.build.version.security_patch
# Verify MediaTek chipset model
adb shell cat /proc/cpuinfo | grep Hardware
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
